V System DAC

[Paul Claesson HUSA]

Hello all

I can see there has been a great deal of feedback and commentary regarding the introduction of our CFV39 and also DAC for V system.

With the initial release of Phocus 1.2.1 a new feature (tool) has been added for V Lens Corrections for the following lenses:
CF/CFE 40 FLE, CFE 40 IF, CFi 50 FLE, CFi/CFE 80, CFi/CFE120, CFi 150, CFE/CFE 180, CFi 250, CFE 250 Sa and CFE 350 Sa.

These corrections also apply to select CF lenses as well. As an example the CF 80, 120, 150 and 180 are optically indentical to the CFi/CFE versions. The DAC will work with lenses dating back to 1982.

Support for additional lenses such as FE series and other CF optics currently omitted from the initial offering and the possible inclusion of extension tubes and tele-converters will take place in time.

With this new thread, i would like your feedback of the lenses (focal lenght and series: C, CF, CFi, CFE, F, FE) that you feel are the most important.

Paul Claesson
Hasselblad USA

 

[polypal]

Paul,

If possible select older designs that have seen later improvement.
I try to avoid older lenses that were not so good as the only correct expression for Zeiss lenses is there are only good ones and even better ones.

I am thinking of the 40 mm Distagon and the 350/ 500 Tele Tessars.
The Tele Tessars could certainly benefit from correction of chromatic aberration.
Although I am perfectly happy with the S-Planars both the 120 and the 135 they are still being used often.

Paul

 

[jotloob]

Paul (C)

For future correction updates , I would very much like the
CZ FE PLANAR 2,0/110mm and the CZ FE SONNAR 2,8/150mm lenses to be added . Thank you .

Jürgen

 

[sportback]

A question for the experts: is the 100mm Planar CF missing from the list because it simply needs no correction?

 

[polypal]

I will not say I am an expert although I own 4 different 100 mm Planars from various generations.

Could well be the er is little to be gained with DAC technology.
The 100 mm is a lens with ultra low distortion and excellent resolution.
That may be the reason not to offer corrections for those lenses.

Paul

 

[vandevantersh]

With the initial release of Phocus 1.2.1
*******
Has 1.2.1 been released? Will the corrections work with images captured with CFV I and II backs or just the CFV39?

Steve

 

[Paul Claesson HUSA]

With the initial release of Phocus 1.2.1
*******
Has 1.2.1 been released? Will the corrections work with images captured with CFV I and II backs or just the CFV39?

Steve

1.2.1 has not been released. It is the process of final testing.
Yes, DAC will work with CFVI & CFVII.

Paul Claesson
Hasselblad USA

 

[Paul Claesson HUSA]

Paul,

If possible select older designs that have seen alter improvement.
I try to avoid older lenses that were not so good as the only correct expression for Zeiss lenses is there are only good ones and even better ones.

I am thinking of the 40 mm Distagon and the 350/ 500 Tele Tessars.
The Tele Tessars could certainly benefit from correction of chromatic aberration.
Although I am perfectly happy with the S-Planars both the 120 and the 135 they are still being used often.

Paul

Paul

Should i assume the 40mm is a C?
135 S, 350, 500 are those C or CF?

Paul

 

[vandevantersh]

1.2.1 has not been released. It is the process of final testing.
Yes, DAC will work with CFVI & CFVII.
********
Thanks...I was sure if the different pixel size, density and sensor geometry would have an effect on the calculations.

Steve

 

[polypal]

Sorry Paul, I should have been more explicit.
Yes, I was thinking of lenses from the C series.
The 120 S-Planar was only available as C lens.
The 135 S-Planar exists as C and as CF lens.

The 100 mm is basically the same lens throughout its production although early C lenses did not have T* coating.
Like Sportback I wonder whether it makes sense to offer DAC for the 100 mm lens.
I just read an offer from an official Hasselblad dealer where he stated the 100 mm is a zero distortion lens.
Of course there are more parameters to consider than just distortion.


Paul

 

[bradleygibson]

I would like to ask for:

1) FE 50/2.8
2) FE 150/2.8
3) FE 150/2.8 + 1.4XE
4) FE 110/2
5) Tele-Superachromat 300/2.8 + APO 1.7XE
6) Tele-Superachromat 300/2.8
7) Tele-Superachromat 300/2.8 + 1.4XE


Thanks, Paul,
-Brad

 

[ulrik]

Here is another vote for the 500 mm C-lens. Maybe the lens that could profit most from a correction of colour fringing. Let's make a deal: Hasselblad provides DAC correction for all older lenses and I will buy a CFV 39 in return ;-).
Ulrik

 

[app]

Dear Paul.

It will be nice to have the DAC support for Schneider CF 140-280 lens as well. Please include it in your list!
Regards
Alex

 

[wbulte]

It will be nice to have the DAC support for Schneider CF 140-280 lens as well. Please include it in your list!
Regards
Alex

I would imagine this to be tricky, as compensation is most likely dependent on focal length. There is no way for the digiback to know the currently selected focal length of the zoom.

Wilko

 

[app]

I would imagine this to be tricky, as compensation is most likely dependent on focal length. There is no way for the digiback to know the currently selected focal length of the zoom.

Wilko

As far as I understand it will be not so difficult. Anyway we have to put manually focal length figure into Phocus.

Alex

 

[Paul Claesson HUSA]

Paul

The 120 S-Planar was only available as C lens.

Believe it or not i do know this and that's why did not include it my post.

The 135 S-Planar exists as C and as CF lens.

Yes, i know and you have ....

I wonder whether it makes sense to offer DAC for the 100 mm lens.
I just read an offer from an official Hasselblad dealer where he stated the 100 mm is a zero distortion lens.

The 100mm is an incredible optic and is near zero distortion. I had to look at the MTF for a CF100 and from my best approximation there is .1% distortion near the edges and corners.

Of course there are more parameters to consider than just distortion.

Vignetting correction, there will be a slight fall off of illumination near the edges and corners so DAC may be of benefit. Of course this is the photographers discretion.

Paul Claesson
Hasselblad USA

 

[JAT]

Hasseblad CFV-39

Thanks Paul for this summary, I am mostly using the CFi60 and CFi100 for which there are no corrections yet available. I rearly, though sometimes use my CFi30. Anything to be expected soon.

Thank you,
Johan

Hello all

I can see there has been a great deal of feedback and commentary regarding the introduction of our CFV39 and also DAC for V system.

With the initial release of Phocus 1.2.1 a new feature (tool) has been added for V Lens Corrections for the following lenses:
CF/CFE 40 FLE, CFE 40 IF, CFi 50 FLE, CFi/CFE 80, CFi/CFE120, CFi 150, CFE/CFE 180, CFi 250, CFE 250 Sa and CFE 350 Sa.

These corrections also apply to select CF lenses as well. As an example the CF 80, 120, 150 and 180 are optically indentical to the CFi/CFE versions. The DAC will work with lenses dating back to 1982.

Support for additional lenses such as FE series and other CF optics currently omitted from the initial offering and the possible inclusion of extension tubes and tele-converters will take place in time.

With this new thread, i would like your feedback of the lenses (focal lenght and series: C, CF, CFi, CFE, F, FE) that you feel are the most important.

Paul Claesson
Hasselblad USA

 

[JAT]

Hasselblad CVF-39

Hi Paul,

this answers my earlier question on the CFi 100. Still be interested to hear about the CFi60 and the CFi30.
Can the back be used on my 903 SWC, I read a lot of controversy. It looks like very useful at f > 5.6-8? Correct ?
Thanks,
Johan

Paul

Believe it or not i do know this and that's why did not include it my post.

Yes, i know and you have ....


The 100mm is an incredible optic and is near zero distortion. I had to look at the MTF for a CF100 and from my best approximation there is .1% distortion near the edges and corners.


Vignetting correction, there will be a slight fall off of illumination near the edges and corners so DAC may be of benefit. Of course this is the photographers discretion.

Paul Claesson
Hasselblad USA

 

[Pete_G]

Hello all

I can see there has been a great deal of feedback and commentary regarding the introduction of our CFV39 and also DAC for V system.

With the initial release of Phocus 1.2.1 a new feature (tool) has been added for V Lens Corrections for the following lenses:
CF/CFE 40 FLE, CFE 40 IF, CFi 50 FLE, CFi/CFE 80, CFi/CFE120, CFi 150, CFE/CFE 180, CFi 250, CFE 250 Sa and CFE 350 Sa.



Paul Claesson
Hasselblad USA

I've just installed Phocus 1.2.1 (Windows) and notice that in the drop down lens list in the DAC panel, the only 40mm lens available is the CFE 40 IF. Am I to assume that the CFE 40 FLE is the same? I had thought these two lenses were optically different.

 

[polypal]

Pete,

They are quite different and I am sure any corrections for the IF version can not be used for the older CF(E) FLE lens.

Hasselblad mentioned corrections for older lenses will become available later.


Paul